Recent content by doktorinjh

If you're building the ortho from the ground surface only, then issues like this all but disappear. Pix4D isn't great at distinguishing the different surfaces (man-made, road, ground, vegetation) so it can be a crap shoot. It's one of Pix's biggest deficiencies and is why Agisoft tends to be a...

Does DataPilot offer terrain following? Their website says that it's offered, but doesn't provide details. The E90 looks like it's about the same sensor size as the P4P (1") and I wouldn't want to go smaller. It's certainly a more expensive option than the P4P, but cheaper than the I2 or M200...

Can you comment as to why you think that it's more versatile? I can see the redundancy case because of the extra motors, but I feel that their integrated screen and OS makes it less versatile, kind of like the P4P+. There are certainly a lot more apps, utilities, and accessories available for...

Picking the right hardware and software is extremely important for obtaining good results. Everything from the right tablet running the correct apps to the right desktop software for processing ground control targets will add up to a good product!

We all had to start somewhere and I want to hear some examples of common errors that you made when you first started out in the surveying and mapping industry. I think some of the most common errors are: Overestimating the accuracy of the on-board GPS Not incorporating ground control Not...

We use GS Pro for 85% of our mapping missions and it works great and it's free. I can't find exact pricing for Terra (nor anyone using it) but internet estimates put it at more than $2000 a year. Unless you're trying to use some of the processing features of Terra, then GS Pro will do just fine...

Ha! I'm willing to do the testing if someone wants to send me one! I haven't mentioned what we have because I didn't want to seem like a corporate shill, but we've got AirGon's Loki system for our P4P and M200 multirotors and an eBee Plus RTK. We finally got our eBee back out of the box this...

Hi Dave! Yes, that would be where I would start from. Your overall accuracy is also going to be dependent on a lot of other factors, such as: the type of surface (gravel, grass, corn field, pavement), the quality of your imagery, the accuracy of your survey equipment, your processing software...

For volume estimates and non-referenced work, an RTK/PPK enabled drone is not likely to be of benefit to you. A P4 flying with the regular, on-board GPS will suffice for almost all volumetric calculations that do not require detailed location information. I've run tests using GCPs and no-GCP...

So are you only focusing now on the Phantom 4 RTK, or all RTK/PPk in general, because you're shifting directly to that model and not RTK/PPK as a whole? I have 3 RTK/PPK rigs and none of them are the Phantom 4 RTK. As of comment #42, you were referring to RTK/PPK drone solutions in general and...

This is a complicated process and I can't blame you for not understanding how the components work together, but I'm going to attempt to go through your statements so that others might learn from this. You've obviously written off aerial mapping using RTK/PPK enabled drones and that's your...

You're fairly handcuffed using the Pro+ model, but I thought that Pix4D Capture was available for that controller. If you think you're going to be doing more of this (and getting paid for it) then you'd be doing yourself a big service by getting a regular controller and using an Android or iOS...

We've done this plenty of times and the answer is that it kind of depends. In essence, the GCPs are always going to drive the model to it's final location. They are usually given the higher accuracy setting in the processing software so you are telling the program that there is no room for...

We are trying to streamline our workflow to a PPK enabled drone and a set of Aeropoints. I know that @amicron doesn't like the Aeropoints, but we've done enough field verification to trust that they are giving us an accurate location. We've run these against their Propeller Correction Network...

You get a much better product when you're using a calibrated camera, as opposed to using an uncalibrated camera. Even with precise geolocation information, your model can be skewed because without a camera calibration the photogrammetry solution will be influenced by lens distortion. We've had...